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The acceleration due to gravity on Earth is 9 point 8 the fraction with numerator m and denominator s squared What is the weight of a 75 kilograms person on Earth?

A
85 cap n
B
735 cap n
C
9 point 8 cap n
D
75 cap n
42
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Which properties can be used to determine whether a substance is a liquid or a plasma? Choose three correct answers.

A
the compressibility of the substance
B
the charge of the substance’s particles
C
the distance between the substance’s particles
D
the container of the substance
E
the color of the substance
F
the mass of the substance
43

Which best contrasts sublimation and vaporization?

A
Sublimation results in a gas, and vaporization results in a liquid.
B
Sublimation involves the release of heat, and vaporization involves the absorption of heat.
C
Sublimation involves a change from a solid, and vaporization involves a change from a liquid.
D
Sublimation involves the absorption of heat, and vaporization involves the release of heat.
44

What is the horizontal acceleration of a ball that is launched horizontally with a velocity of 5 point 6 m/s ?

A
5 point 6 m/s squared
B
0 m/s squared
C
9 point 8 m/s squared
D
negative 9 point 8 m/s squared
45

A stretched spring has 5184 cap j of elastic potential energy and a spring constant of 16 comma 200 cap n over m What is the displacement of the spring?

A
0 point 6 4 m
B
0 point 8 0 m
C
0 point 5 7 m
D
1 point 2 5 m
46

What is the kinetic energy of an object that has a mass of 50 point 0 kilograms and a velocity of 18 meters per second ?

A
900 cap j
B
450 cap j
C
8 comma 100 cap j
D
16 comma 000 cap j
47

What is the magnitude of the resultant vector?

A
60 miles
B
169 miles
C
13 miles
D
17 miles
48

Which segment shows the substance changing from a gas to a liquid?

A
X-Y
B
Y-X
C
W-X
D
X-W
49

An advertising agency writes marketing material for a new motor (Brand W) that has a power rating of 7,640 W. Which statement comparing the motors can they truthfully use?

A
There’s not a more powerful motor available.
B
Every second, Brand W motor does 7,640 N of your toughest work.
C
Brand W motor can finish any job faster than Brand Y motor can.
D
Brand W motor does more work each second than Brand X or Brand Z.
50

Which energy transformation is correct?

A
From D to E, gravitational potential energy is transformed into kinetic energy.
B
From C to E, gravitational potential energy is transformed into kinetic energy.
C
From A to C, kinetic energy is transformed into gravitational potential energy.
D
From C to D, kinetic energy is transformed into gravitational potential energy.

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